Footgear-forming machine



Oct. 16Q1928. 1,688,007

A. EICHBERG ET AL 1 foow GEAR-FORMING momma Filed Sept. 17, 1926 2Sheets-Sheet l E as 211152 Arizur 1 12:5 22? 9 111125 ji /5 :6 W K Mi A.EICHBERG ET AL FOOT GEAR FORMING MACHINE Oct. 16, 1928. v 1,688,007

Filed Sept. 17. 1926 g Sheets-Sheet 2 A a 5 9 P4 25 :z m F W5 W I 16 d.7' @141 14 15 h 415/ 23 4/2 1/1 M 1 2? Patented Oct. 16, 1928.

UNITED STATES. PATENT orries. I

Amnun' EICI-IBERG AND HANS nin'rz, or CHICAGO, ILLINOIS.

FOOTGEAR-FORMING MACHINE.

Application filed September 17, 1926. Serial No. 136,102.

The invention relates broadly to a foot gear forming machine,

An object of the invention is to prov de a machine for stretching andforming foot gear hat is inexpensive of manufacture, simple of operationand capable of efficiently performing the functions for which it sdesigned and is particularly adapted to use in the manufacture of onepiece foot gear.

Another object of the invention is to construct a simple machine of thisclass in which is provided stretching elements arranged to.

' frame or as a number of separate units arranged one above the other oradjacent each other and capable-of being conveniently operated by one orseveral separate sources of power.

Another object of the invention is to proride in a machine of this kindadriving mechanism of the self locking type such as a wormtransn'iission, that will substantially automa-- tically lock upon thestopping of the motor, thereby preventing an over-stretching or injuringof the article of foot wear that being formed thereon.

Another ob ect of the invention is to provide an automatic clrcuitbreaking device in the machine that can be set to stop motor as thestretching elements reach any predetermined point, thereby preventingthe stretching elements from traveling beyond the desired point by theforce of the stored up energy iii-the moving parts of the machine. I Y

Another object of the invention is to provide adjustable means forengaging theoutei' surface of the boot to insureits taking a properconfiguration.

V ith the foregoing andsuchother objects in view as will appear as thedescription proceeds,.the invention resides in the combina'- tion andarrangement of parts and in the details of constructlon hereinafterdescribed and claimed, it being'understood that changes in the preciseembodiment herein described, may be made within the scope of what isclaimed without departing from the spirit of the invention; r

In the drawings: a Figurel is a rear elevation showing the drive side ofthe machine, disclosed as a plurality stage type,with the duplicateoperating mechanisms assembled as a unit between a single set of frames.

Figure 2 is an end levation viewed in the direction of the arrowsindicated in-Figure 1, at line 2-2. V

Figure 3 is a transverse sectional View shown on an enlarged scale takenon line 33 of Figure 1.

Figure 4 1s a fragmentary transverse sectional view taken on line 44 ofFigure 1 drawn on an enlarged scale.

Figure 5 is a fragmentary vertical sectional View taken on line 5-5 ofFigure 2 drawn at an enlarged scale.

Figure 6 is a perspective view of one of the sections of one of thepairs of sliding elements shown connected to the uprights.

The frame proper. comprises a pair of standards or side frames 11 and 12secured to a base plate 13, by means of bolts or studs 14 extendingthrough flanges 15 provided at the bottom end of said side frames.

The standards are also provided with a pluralityof horizontally alignedbosses 16 through which tie rods .17 extend to secure said standardstogether, said side frames being held in spaced relation to each otheragainst the tension of the tie rods 17 by spacer I tubes 18 disposedover said tie rods.

Brackets 19 extend outwardly from the rear sides of the standards 11 and12 at spaced intervals and are secured to finished bosses cast on saidframes to hold said standards rigidly in place for mounting operatingmeans, for parts to be hereinafter described.

'Grooves 2121 are cut in the standards 11 i and Y12 in horizontalalignment with each other 7 to receive sliding elements. Thesesliding-elements, as best illustrated in Figure 6, are each formed of anangle iron having its ends '22 bent inwardly at right angles theretosubstantially parallel to each other, and notched as at 23 to receivestretching elements. The ends or legs '22 are adapted to slidinglyfitinto the grooves '2121 of the side frames 11 and 12. I

ments is a complementalsection ofa divided The vertically alignedsections of the pairs of sliding elements hare secured together, one

series of sections byuprights 24 and th'eother series of superposedsections by uprights'24: Channels 25 and 25*- are secured one t o-each=pair of spaced uprights 24 and 24 1n any convenient manner,substantially' in the'sam'er horizontal plane, and are provided withnuts 26 and 26*, the nuts 26-beingsplit for assembling and of oppositehand to the nuts 26 mounted on the-oppositechannel-25. The shafts 27each have a'right hand threadcut onits end'28 a-nd'a'left hand threadcut-on its end 28. These shafts extend through the solid nuts 26* andthe split nuts 26 into bearings 31 formed on brackets 19. A collar32"issecured on each of the shafts 27-to abut themn'er *side ofthe-bracket bearings 31 to prevent axial displacement" 1n one direction,and" "worm gears 33' secured to each shaft on the opposite side of thebearings3-1to prevent axial displacement inthe opposite direction andto'form means for engaging the driving means provided for the machine.

Pairs-oflugs 34 are'cast integral with the brackets 19' and are bored invertical alignment with each other to rotatably receive a verticalshaft35 'which' has secured toit,

worms 36 arranged to be disposed betweenthe pairs of lugs 34, and placedto mesh-with the worm gears'33l- This shaft 35- is directly connected toa motor 37, mounted-onth'e' base Pairs of stretching elements comprisingsections 38 an'd- 39 are preferably formed of flat material'having theirends 41 and42' directed; at substantially right angles thereto andparallel with each other and *then para-l-lelly 'outwardlyas at 43 and44, subs-tam tiallyparallel tothe main portions 38- and '39 Thesestretcher of said stretcher elements. elements are arranged to' lit inthe notches 23 inthe'sli ding elements so that as said'slidi'ng elementsareeith'er forced apart or drawn together, they transmit -a similarmovement to the stretcherelements38 and- 39.

Connected toeachof these stretcher eleform comprising sections 45 and 46which are adapted to carrya leathercovering 47 from which the foot gearis made which will also be forced inwardly or'outw'vardly-as theslidin}; elements are forced. inward or outward.

A frame 49 of substantiallythe shape of the 5 outerside' of the bootor-shoe 47 is-secured to the stretcher element section 39, and-carriesthumb screws 51 spaced therein and arranged to engage a contour plate 52ar-- ranged to engage the'leather 47 0f the foot gear'lying'b'etween theform-46 and the contour plate52.

An electrical snap switch 53 is secured-"tothe bracket 19 which will beengaged by one of th'e'angles 24-as it reaches a predetermined distance,thereby breaking the circuit at a tially as follows The divided formsarein serted inside of the leather, formed substantial'ly tdthe shape of a"boot or other foot gear; which has previously been soakedfln a liquid,then the-wedges '56'are forced between the stretching elements 39 tohold thesection ofthe fo-rmu'igrd. The contour plate 52 isnext put in;place along the boot and the thumb screws 51 adjusted tohold the'leatherof thefrontpart of the bootin contactwith the form on'the side 46,0rcontour plates may be provided for both sides of -the bootif desired.

p The stretching elements 38 and 39are'next inserted in the notches 23of the sliding ele-' ments, the machineis-then-ready for the The currentis turned on starting the motor which rotates the shaft 35 in onedirection-,whiclr causes the sliding elements-to separate througlr rightand left hand thread on the shafts-27 until the circuitstretellingoperation;

is broken by the contact o-fione of the angles 24 with the" electricalswitch 53,- whereupon the motor will stop, and the worm drive will lockthe machine in this position, where itrisallowed to stand until the footgear, orboot isproperly formed anddried, after which the motoris-reversed bythe hand switch 57,

causing the sliding elements to move toward l each other until released.Another switch may be provided to auton'iaticallystop the motorafterthesliding elements havemoved toward each other asufiicientdistance or the switch 57 maybe thrown out by hand;

The stretcher elements are then removed from the machine and the wedges56 removed 3 from between the complemental'sections of the divided formand theboot removed','the

machine is then ready to repeat the cycle. WVe'claim':

1. In a machine of the class described, a'

pair of side frames having aligned grooves in their inner sides, alignedelements'slidably mounted therein, stretching elements opera tively'associated with'said sliding elements, a form carried by said stretchingelements and means for operating said sliding elements whereby saidform' is expanded.

2. Ina machine of the class described, side frames having alignedgrooves in their inner sides, aligned elements slidably mounted there1n,stretching elements operatively associated with said sliding elements,adividedf form carried bysaid' stretching elements and means foroperating said-sliding elements said covering in contact with the outerpeof said form and means for operat riphery ing said sliding elementswhereby said form is caused to exert an expanding pressure on said footcovering. 1

4. In a machine of the class described, a frame, aligned elementsslidably mounted therein, a divided form, a stretching element securedto the adjacent inner side of each section of said form and detachablyconnected to said slidable elements, and means for reciprocating thelatter elements whereby a cor responding movement is transmitted to thesections of the form.

5. In a machine of the class described adapted to form foot gear, alongitudinally divided form, stretching elements secured to the adjacentlongitudinal edges of the sec tions of said form, spacer elementsbetween said stretching elements, slidable elements suitably mounted ina frame and detachably connected to said stretching elements and meansfor reciprocating said sliding elements whereby a corresponding movementis transmitted to said form sections.

6. In a machine of the class described, side frames mounted on a base,cross braces securing said side frames, a plurality of said braceshaving a journal therein, a plurality of pairs of sliding elementsmounted in said side frames, members connecting the vertically alignedcomplemental sections of the pairs of sliding elements, a shaft havingthreads of opposite hand on their respective ends journaled in aplurality of said cross braces and means for driving said shafts wherebya correspondent movement is trans mitted to said sliding elements.

7. In a machine of the class described, side frames mounted on a base, aplurality of cross braces each provided with a journal securing saidframes, a plurality of pairs of sliding elements mounted in said sideframes, stretching elements adapted to operate forms operativelyassociated with said sliding elements,

uprights connecting the vertically aligned sections of the pairs ofsliding elements, a right and left hand nut on each pair ofsections ofthe pairsofuprights, shafts'having' caused-to expand or contractdepending upon I the direction of rotation of said shafts.

8. In a machine of the class described, slde frames mounted on a base,cross braces securing said frames,'a plurality of said braces beingprovided with journals, a plurality of pairs of sliding elements mountedin'said side frames, stretching elements adapted to operate formsoperatively associated with said sliding elements, uprights connectingthe vertically aligned sections of the pairs of sliding elements, aright and left hand nut on each section of the pairs of uprights, shaftshaving a portion threaded right hand and a portion threaded left handmounted in aforementioned journals arranged to engage said nuts, wormgears secured to the ends of said shafts abutting said journalspreventing displacement of the shafts in one direction, means forpreventing displacement of said shafts in the opposite direction, wormsarranged to drive said worm gears and means for driving said worms.

9. In a machine of the class described, a'

frame, aligned elements, slidably mounted therein, stretching elementsoperated by said aligned elements, means for operating said slidingelements and means for automatically stopping and locking the device ata predetermined point.

10. In a machine of the class described, a frame, aligned elementsslidably mounted therein, a divided form, stretching elementsoperatively associated with said form and aligned slidable elements, aworm drive and means for automatically breaking an electrical circuitwhereby the machine is stopped and automatically locked against furtherrotation. v

11. In a machine of the class described, a frame, aligned elementsslidably mounted therein, a divided form, stretching elementsoperatively' associated with said form' and aligned slidable elements, aworm drive and means for driving said machine, means for automaticallybreaking an electrical circuit whereby the machine is stopped andautomatically locked and means'for reversing the direction of rotationof said machine.

In testimony whereof we afiix our signatures at'lO South LaSa'lle St,Chicago, Illinois. V

ARTHUR EICHBERG. I HANS DIETZ.

